See Also Plate

Nucleus ambiguus

Cranial root of accessory nerve (joins vagus nerve and via recurrent laryngeal nerve supplies muscles of larynx, except cricothyroid)*

Jugular foramen

Nucleus ambiguus

Cranial root of accessory nerve (joins vagus nerve and via recurrent laryngeal nerve supplies muscles of larynx, except cricothyroid)*

Jugular foramen

Superior ganglion of vagus nerve

Accessory nerve (XI)*

Inferior ganglion of vagus nerve

C1 spinal nerve

C2 spinal nerve

C3 spinal nerve

C4 spinal nerve

Inferior Cervical Ganglion

Efferent fibers Proprioceptive fibers

Superior ganglion of vagus nerve

Accessory nerve (XI)*

Inferior ganglion of vagus nerve

C1 spinal nerve

C2 spinal nerve

Accessory nerve

(to sternocleidomastoid and trapezius muscles)

Sternocleidomastoid muscle (cut)

C3 spinal nerve

C4 spinal nerve

Trapezius muscle

Efferent fibers Proprioceptive fibers

*Recent evidence suggests that the accessory nerve lacks a cranial root and has no connection to the vagus nerve. Verification of this finding awaits further investigation.

Hypoglossal nerve (XII)

(in hypoglossal canal)

Meningeal branch

Superior longitudinal

Intrinsic muscles f Transverse of tongue and vertical

Inferior longitudinal

Hypoglossal nucleus

Occipital condyle

Inferior ganglion of vagus nerve

Ventral rami of C1, 2, 3 form ansa cervicalis of cervical plexus

Hypoglossal nerve (XII)

(in hypoglossal canal)

Meningeal branch

Superior longitudinal

Inferior longitudinal

Hypoglossal nucleus mn

Ansa Cervicalis Nerve

Ventral rami of C1, 2, 3 form ansa cervicalis of cervical plexus

Superior cervical sympathetic ganglion

Internal carotid artery

Inferior root of ansa cervicalis

Occipital condyle

Inferior ganglion of vagus nerve

Geniohyoid muscle

Hyoglossus muscle

Thyrohyoid muscle'

Sternohyoid muscle

Superior root of ansa cervicalis

Internal jugular vein

Common carotid artery

Sternothyroid muscle

Omohyoid muscle (inferior belly)

Genioglossus muscle

Geniohyoid muscle

Hyoglossus muscle

Thyrohyoid muscle'

Omohyoid muscle (superior belly)

Sternohyoid muscle

Superior cervical sympathetic ganglion

Superior root of ansa cervicalis

Internal carotid artery

Inferior root of ansa cervicalis

Internal jugular vein

Common carotid artery

Sternothyroid muscle

Omohyoid muscle (inferior belly)

Efferent fibers Afferent fibers

Nerves of Heart

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